Pressure control valve structure

Abstract

The utility model discloses a pressure control valve structure which comprises a valve body, the interior of the valve body is of a hollow structure, a through hole is formed in the lower end of the valve body, external threads are arranged on the outer side face of the lower end of the valve body and used for being in threaded connection with a high-pressure oil pump, and an oil drainage hole is formed in the outer side face of the lower end of the valve body. A valve seat, a guide sleeve, an armature, an electromagnetic valve spring, a coil and an electromagnetic valve are installed at the bottom of the valve body from bottom to top, and the pressure control valve structure can enable rail pressure control to be more accurate, ensure that the pressure of a common rail system is more stable and ensure safe operation of an engine.

Description

TECHNICAL FIELD

[0001] The utility model relates to engine high pressure common rail technical field, concretely is a pressure control valve structure. BACKGROUND

[0002] Pressure control valve is a device that adjusts the fuel quantity of high pressure fuel pump into common rail pipe according to ECU instruction to adjust the rail pressure of common rail system, including pressure rise, reduction and keeping constant, plays an important role in engine high pressure common rail system.

[0003] The existing pressure control valve cannot stably control fuel pressure, makes the pressure of common rail system easy to appear abnormal, and sensitivity is low, influences the safe operation of engine. SUMMARY

[0004] The utility model solves the technical problem that overcomes the existing defects, provides a pressure control valve structure, can make the rail pressure control more accurate, ensures the pressure of common rail system is more stable, guarantees the safe operation of engine, can effectively solve the problem in the background art.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a pressure control valve structure, including valve body, the inside of valve body is hollow structure and the lower end of valve body is opened and is penetrated the hole, the lower end outside surface of valve body is provided with external thread, is used for the threaded connection high pressure fuel pump, the lower end outside surface of valve body is seted up and is opened the oil drain hole, the bottom of valve body is installed valve seat, guide bushing, armature, solenoid valve spring, coil and solenoid valve from below to above respectively;

[0006] Valve seat is installed in the inside lower end of valve body, the guide bushing is set up in the upper end of valve seat, the guide bushing is opened and is seted up three oil channels, three oil channels are evenly distributed along guide bushing center axis, the oil channel and the oil drain hole position correspond, the armature is coaxial installation with guide bushing and the armature sleeve is connected in the upper end outside surface of guide bushing, the solenoid valve spring is installed in the upper end of armature, the coil is located the outside of solenoid valve spring and the outside surface of coil is in close contact with the inside surface of valve body, the solenoid valve is installed in the upper end of coil, the solenoid valve is seted up and is connected with ECU control box respectively with two binding posts.

[0007] As a preferred technical scheme of the utility model, the outside surface of the guide bushing is sleeved with a compression nut, the compression nut is in close contact with the stepped end surface of the guide bushing, and the compression nut is threadedly connected with the inside surface of the valve body.

[0008] As a preferred technical scheme of the utility model, an adjusting pad is arranged between the valve body and the coil.

[0009] As a preferred technical scheme of the utility model, the armature limiting shaft is arranged between the electromagnetic valve spring and the armature, one end of the armature limiting shaft is connected with the armature, and the electromagnetic valve spring is sleeved on the outer side surface of the armature limiting shaft.

[0010] As a preferred technical scheme of the utility model, the gasket is arranged between the electromagnetic valve spring and the coil.

[0011] As a preferred technical scheme of the utility model, the electromagnetic valve O-shaped ring is arranged between the electromagnetic valve and the inner side surface of the valve body.

[0012] As a preferred technical scheme of the utility model, the electromagnetic valve locking nut is sleeved on the outer side surface of the electromagnetic valve, and the electromagnetic valve locking nut is threadedly connected with the inner side surface of the valve body.

[0013] Compared with the prior art, the utility model has the beneficial effects that: the pressure control valve has reasonable structure design and ingenious design, the armature is controlled to move up and down under the electromagnetic force of the coil through energization of the electromagnetic valve, thereby opening and closing the oil leakage passage, the purpose of controlling pressure is achieved, pressure control is more sensitive, and the pressure of the common rail system is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an internal structure schematic view of the utility model;

[0015] Figure 2 It is an explosion view of the utility model.

[0016] In the drawing: 1 electromagnetic valve, 2 electromagnetic valve locking nut, 3 electromagnetic valve O-shaped ring, 4 coil, 5 gasket, 6 electromagnetic valve spring, 7 armature limiting shaft, 8 armature, 9 adjusting pad, 10 compression nut, 11 guide sleeve, 12 valve seat, 13 valve body, 14 oil passage, 15 oil leakage hole. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments (for the convenience of description and understanding, the following is described with the upper side as the upper side). Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. Figure 1 Please refer to

[0018] Figures 1-2 ​The utility model provides a technical scheme: a pressure control valve structure, including valve body 13, the inside of valve body 13 is hollow structure and the lower end of valve body 13 is opened and has the through hole, the lower end outside surface of valve body 13 is provided with outer thread, is used for the threaded connection high pressure oil pump, the lower end outside surface of valve body 1 is opened and has oil drain hole 15, the bottom of valve body 13 is installed valve seat 12, guide bushing 11, armature 8, electromagnetic valve spring 6, coil 4 and electromagnetic valve 1 from bottom to top respectively,

[0019] Valve seat 12 is installed at the inside lower end of valve body 1, guide bushing 11 is arranged at the upper end of valve seat 12, three oil channels 14 are arranged in guide bushing 11, three oil channels 14 are evenly distributed along the central axis of guide bushing 11, oil channel 14 corresponds with the position of oil drain hole 15, armature 8 is coaxially installed with guide bushing 11, and the upper end outside surface of guide bushing 11 is sleeved with armature 8, under the electromagnetic action of coil 4, armature 8 moves up and down along guide bushing 11.

[0020] Electromagnetic valve spring 6 is installed at the upper end of armature 8, coil 4 is located at the outside of electromagnetic valve spring 6, and the outside surface of coil 4 is attached to the inside surface of valve body 13, electromagnetic valve 1 is installed at the upper end of coil 4, and two terminal posts are arranged on electromagnetic valve 1 and connected with ECU control box.

[0021] Further, the outside surface of guide bushing 11 is sleeved with compression nut 10, the stepped end surface of compression nut 10 is attached to guide bushing 11, compression nut 10 is screw-connected with the inside surface of valve body 13, and valve seat 12 and guide bushing 11 are compressed under the action of compression nut 10.

[0022] Further, adjustment pad 9 is arranged between valve body 13 and coil 4, and the space for the up-and-down movement of armature 8 is provided.

[0023] Further, armature limiting shaft 7 is arranged between electromagnetic valve spring 6 and armature 8, one end of armature limiting shaft 7 is connected with armature 8, electromagnetic valve spring 6 is sleeved with the outside surface of armature limiting shaft 7, plays a limiting role, prevents the high pressure from exceeding the yield strength of electromagnetic valve spring 6, and prolongs the service life of electromagnetic valve spring 6.

[0024] Further, gasket 5 is arranged between electromagnetic valve spring 6 and coil 4, and the abrasion of coil 4 caused by collision when electromagnetic valve spring 6 is compressed is avoided.

[0025] Further, electromagnetic valve O-ring 3 is arranged between the inside surface of valve body 13 and electromagnetic valve 1, and plays a sealing role.

[0026] Further, electromagnetic valve locking nut 2 is sleeved with the outside surface of electromagnetic valve 1, electromagnetic valve locking nut 2 is screw-connected with the inside surface of valve body 13, and the fixed installation of coil 4 and electromagnetic valve in valve body 13 is ensured.

[0027] In use: when the solenoid valve 1 is not powered, the pressure of the solenoid valve spring 6 is greater than the force of the fuel on the valve seat 12, so that the armature 8 is sealed with the valve body 13, and the fuel cannot be leaked; when the solenoid valve 1 is powered, under the action of the electromagnetic force of the coil 4, the armature 8 moves upward to compress the solenoid valve spring 6, the connecting surface of the armature 8 and the valve body 13 is separated, the fuel flows from the valve seat 12 to the oil passage 14, and then flows out from the oil leakage hole 15.

[0028] The armature limiting shaft 7 of the utility model can effectively prevent the yield strength of the solenoid valve spring 6 from being exceeded in the case of high fuel pressure, and prolong the service life of the solenoid valve spring 6; in combination with the structure of the solenoid valve 1, the oil leakage passage is opened and closed by controlling the up-down movement of the armature 8, the purpose of sensitive control of pressure is achieved, and the pressure of the common rail system is more stable.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure control valve structure comprising a valve body (13), the inside of which is a hollow structure and the lower end of which is provided with a through hole, and the outer side of the lower end of which is provided with an external thread for screwing a high pressure oil pump, characterized in that: The lower end outer side of the valve body (1) is provided with a oil drain hole (15), the bottom of the valve body (13) is provided with a valve seat (12), a guide sleeve (11), an armature (8), an electromagnetic valve spring (6), a coil (4) and an electromagnetic valve (1) from bottom to top. The valve seat (12) is installed at the inner lower end of the valve body (1), the guide sleeve (11) is arranged at the upper end of the valve seat (12), three oil channels (14) are arranged in the guide sleeve (11), the three oil channels (14) are evenly distributed along the central axis of the guide sleeve (11), the oil channels (14) correspond to the position of the oil drain hole (15), the armature (8) is coaxially arranged with the guide sleeve (11) and the armature (8) is sleeved on the outer side of the upper end of the guide sleeve (11), the electromagnetic valve spring (6) is arranged at the upper end of the armature (8), the coil (4) is arranged outside the electromagnetic valve spring (6) and the outer side of the coil (4) is in close contact with the inner side of the valve body (13), the electromagnetic valve (1) is arranged at the upper end of the coil (4), and two terminal posts are arranged on the electromagnetic valve (1) and connected with an ECU control box.

2. The pressure control valve structure according to claim 1, characterized by: The outer side of the guide sleeve (11) is sleeved with a compression nut (10), the compression nut (10) is in close contact with the stepped end face of the guide sleeve (11), and the compression nut (10) is in threaded connection with the inner side of the valve body (13).

3. The pressure control valve structure according to claim 1, characterized by: An adjusting pad (9) is arranged between the valve body (13) and the coil (4).

4. The pressure control valve structure according to claim 1, characterized by: An armature limiting shaft (7) is arranged between the electromagnetic valve spring (6) and the armature (8), one end of the armature limiting shaft (7) is connected with the armature (8), and the electromagnetic valve spring (6) is sleeved on the outer side of the armature limiting shaft (7).

5. The pressure control valve structure according to claim 1, characterized by: A gasket (5) is arranged between the electromagnetic valve spring (6) and the coil (4).

6. The pressure control valve structure according to claim 1, characterized by: An electromagnetic valve O-ring (3) is arranged between the electromagnetic valve (1) and the inner side of the valve body (13).

7. The pressure control valve structure according to claim 1, characterized by: An electromagnetic valve locking nut (2) is sleeved on the outer side of the electromagnetic valve (1), and the electromagnetic valve locking nut (2) is in threaded connection with the inner side of the valve body (13).

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